An optical technique is described which is capable of compensating the effects of imperfect spatial coherent illumination on the performance of a modified Mach-Zehnder spectrum analyzer. Methods for experimentally determining the complex mutual coherence function of the illumination using the analyzer are also described. The addition to the system of a calibrated phase shifter controlled by a minicomputer is proposed, which permits the spectral amplitude and phase to be determined automatically in real time.
© 1981 Optical Society of America
P. L. Ransom, C. S. Gardner, and W. J. Atkins, Jr., "Compensation of coherence effects in an optical spectrum analyzer," Appl. Opt. 20, 1951-1954 (1981)